Six weeks ago I installed Full Force Reman Single Shot 160cc. I went with TW tunes which I am running on a Hydra. My problem are multi-faceted but I will try to describe them the best I can. Also I am on my 1st set of revised tunes from TW and they still aren't quite right.

1) As soon as I put the truck in drive the rpms jump up to 900-950 and won't come back down until it's back in park for a couple of minutes.

2) Throttle is really touchy. When the torque converter is locked if I let off/on the throttle it results in a hard jerk through the entire drivetrain. It feels a lot like differential lash but I know it's not as I did not have this issue with the stock injectors. Also because the throttle is so touchy cruise control is almost impossible cause the truck starts bucking trying to maintain light throttle.

3) When coasting between 15-30mph the idle hangs at 1,000rpms and sounds like the injectors are cutting in/out constantly. Its really, really annoying.

4) The SES light flashes randomly all the time and I am getting a P1316 code. I never had this code prior to the single shot injectors. And when I installed them I put in all new OEM harnesses/gaskets in. I have ohm tested and buzz tested the injectors with no faults detected. This one has me absolutely stumped.

I would appreciate any help, at this point I am really regretting putting in single shots as my truck runs worse now that it did with worn out AD's.

Yes it will idle a little rough, but not nearly as bad as what you're describing.
If it runs better without the chip, try another tuner
If it still sucks without the chip, I would take off the valve covers and be sure you got everything hooked up correctly.

My money is on a slightly loose harness connection.

Check fuel pressure too. Injectors are too expensive to not know that your FP is good.

Did some data logging on the way home today. I noticed the at idle the accelerator position is 11.43%. When I step on the pedal I have to get to 22% before I get a raise in RPMs and at that point it jumps to 1,300 RPMs. What would cause a dead spot even though the computer clearly sees the pedal movement?

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